CODEWITHSUNDEEP
androidandroid-camera2android-camerax
Aaditya Sawant
Aaditya Sawant

Reputation: 29

How to capture/get camera White Balance value using camera2 API or CameraX library while camera is open and before image capturing

I want to get the white balancing value at runtime while the user opens the camera. I want to show user some message if the current white balance value is not in some specified range.

Upvotes: 2

Views: 557

Answers (1)

Haider Saleem
Haider Saleem

Reputation: 773

Create a CameraCaptureSession.CaptureCallback callback and implement its function like

private val captureCallbackListener: CameraCaptureSession.CaptureCallback =
    object : CameraCaptureSession.CaptureCallback() {
        override fun onCaptureStarted(..){}
        override fun onCaptureProgressed(..){}
        override fun onCaptureCompleted(
            session: CameraCaptureSession,
            request: CaptureRequest,
            result: TotalCaptureResult
        ) {
                Log.d(TAG, "onCaptureCompleted White Balance: ${result.get(CaptureResult.COLOR_CORRECTION_MODE)} and ${result.get(CaptureResult.COLOR_CORRECTION_GAINS)} and ${result.get(CaptureResult.COLOR_CORRECTION_TRANSFORM)}")

          }

}

These logs above will provide you all info related to White Balance. Pass this callback while creating camera preview in cameraCaptureSessions!!.setRepeatingRequest as

 cameraCaptureSessions!!.setRepeatingRequest(
        captureRequestBuilder!!.build(),
        captureCallbackListener,
        mBackgroundHandler
    )

Upvotes: 1

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